JP2814083B2 - Car anti-theft system - Google Patents

Description

The present invention relates to an anti-theft system for automobiles, and more particularly to an anti-theft system for automobiles which can cope with a case where an automobile door is unlocked and stolen.

(B) Conventional technology Conventionally, when an owner (driver) of an automobile leaves the automobile to prevent theft, the window glass is closed, and a door key is inserted into a door cylinder lock of the automobile door and locked.

However, a thief may insert a wire or an imitation door key into the door key during parking, unlock the door lock, and steal a car stereo, a car air conditioner, or the like in the automobile.

Recently, the doors of automobiles have been unlocked, stealing not only the car stereo inside the car, but also the entire car, and using this stolen vehicle, theft, abduction of children, secondary accidents such as traffic accidents, etc. An incident has occurred.

Therefore, for example, Japanese Patent Application Laid-Open No. 62-99240 discloses a burglar alarm for automobiles that includes means for outputting an electric signal when a key is inserted into a key switch, and means for generating an alarm sound by the electric signal of the key. An apparatus is disclosed.

Japanese Patent Application Laid-Open No. 62-289454 discloses that a key magnetic body is embedded in a key to be inserted into a door cylinder lock, and key detecting means for detecting a magnetic field formed by the magnetic core is provided around the cylinder lock. After the alarm means is activated to the standby state by removing this key, when the key having the corresponding magnetic material is inserted into the cylinder, the operation of the alarm means is invalidated, and other keys and foreign matter are inserted. An anti-theft device for a vehicle has been proposed in which, when a key is operated in an unlocking direction, an alarm means is activated to generate an alarm.

Furthermore, Japanese Utility Model Application No. 59-201169 (Japanese Utility Model Application Laid-Open No. 61-1111863)
The microfilm has a key switch that turns on the door cylinder lock only during the key operation period and turns off in other states, and unlocks the door cylinder lock using a normal door key when the alarm means is in the standby state In such a case, an anti-theft system for a vehicle has been proposed in which a standby state is released when the door key cylinder is unlocked without performing a normal operation, and an alarm is activated to generate an alarm. .

By the way, Japanese Utility Model Application No. 60-40438 (Japanese Utility Model Application No. 61-155255)
Key) on the microfilm of (key) (cylinder lock)
And a magnet that generates a magnetic field that crosses the key inserted therein, and a coil that is disposed in the magnetic field formed by the magnet and that is connected to the alarm means. There has been proposed an anti-theft device for an automobile configured to detect a change in a magnetic field generated when a magnetic material such as a tip of a vehicle is inserted by the coil and activate a warning unit to generate a warning.

(C) Problems to be Solved by the Invention However, according to the above-described vehicle burglar alarm device, it is possible to prevent the vehicle from being stolen by generating an alarm sound when a key is inserted into a key switch. In the gazette, a means for outputting an electric signal when a key is inserted into a key switch is simply described as a "switch circuit for detecting that a key has been inserted into a key switch". It is not clear what kind of configuration is provided.

According to the above-described vehicle antitheft device, when the door cylinder lock is operated in the unlocking direction using a key other than a key having a magnetic password, for example, a screwdriver, an alarm is activated. That is, since no alarm is generated at the stage when the key is inserted into the door cylinder lock, the door cylinder lock cannot be prevented from being broken. Therefore, although the car can be prevented from being stolen, a legitimate user of the car is forced to replace the cylinder lock, which causes unnecessary expense. In addition, there is a problem that a key having a password magnetic material cannot be duplicated at low cost like a general key.

Further, in the above-described automobile anti-theft system, no alarm is issued at the stage before the door cylinder lock is unlocked similarly to the previous example, and the door cylinder lock cannot be prevented from being broken. In addition, in this case, there is a problem that even when the door cylinder lock is unlocked in the same procedure as a normal key operation using a key other than a valid key, no alarm is issued.

In addition, according to the above-described conventional example, when a magnetic body such as a screwdriver tip is inserted into a cylinder lock, the start of car theft can be detected, but the same material as a legitimate door key or other non-magnetic material is used. Using a fabricated counterfeit key, pseudo key, driver, etc., the cylinder lock can be unlocked and unlocked without alarm, and the cylinder lock can be broken, and the car or its interior equipment etc. There is a disadvantage that theft cannot be prevented.

In addition, a magnet and a coil must be arranged around the inner cylinder of the cylinder lock, which increases the size of the cylinder lock, which is disadvantageous in reducing the weight of the car, and in which the user has already You may not be able to wear it.

In view of the problems of the conventional vehicle door lock technology and the technical problem of the vehicle anti-theft system, the present invention inserts something, whether a magnetic material or a non-magnetic material, into a vehicle door lock. If an attempt is made to unlock the vehicle, an alarm will be issued, preventing not only the theft of the car and the equipment inside the car, but also the destruction of the door key, as well as preventing the cylinder lock from becoming large and preventing the quantity of the car from increasing It is another object of the present invention to provide an automobile anti-theft system that allows a user to easily retrofit an already purchased automobile.

(D) Means for Solving the Problems In order to achieve the above object, according to the present invention, a door cylinder lock having an outer cylinder and an inner cylinder having a key insertion port is provided in an automobile, and the key insertion port is provided. A vehicle comprising: a sensor for detecting that a door key or other object has been inserted into a key slot; and an alarm device for issuing an alarm when the sensor detects that a door key or other object has been inserted into a key insertion slot. In the anti-theft system, a through hole is formed that crosses the key insertion port over the outer cylinder and the inner cylinder, and the sensor includes an optical sensor disposed in a hole in the outer cylinder that forms the through hole. It is a feature.

This optical sensor is not particularly limited, and includes a photosensor and a photointerrupter generally known as an optical sensor. Among these, it is preferable to use a photointerrupter whose output changes on and off depending on the presence or absence of a detection target in order to increase the reliability of detection.

Therefore, as the sensor, a light emitting element arranged in a hole in one of the outer cylinders constituting the through hole,
It is recommended to use an optical sensor comprising a light receiving element arranged in the other hole.

In consideration of cost, it is recommended to use a light emitting diode as the optical element, and it is recommended to use a phototransistor as the light receiving element.

Also, some of the above photosensors are simply composed of light receiving elements, but in order to increase the certainty of detection,
It is preferable to use a device that includes a light-emitting element that irradiates light to a detection target and a light-receiving element that receives light reflected from the detection target.

The alarm device used in the present invention is not particularly limited as long as it is driven by an alarm signal from a control unit that senses an output signal from the sensor and an output signal from an alarm device driving unit described later. Instead, for example, a buzzer that generates an abnormal alarm sound, a horn of an automobile, a red light lamp that generates red light, or a combination thereof may be used.

The alarm device driving means is not particularly limited as long as it transmits a signal for driving the alarm device.For example, a remote control transmitter and a receiver, a light-emitting element and a light-receiving element, outside the body of an automobile One that transmits a signal for driving the alarm device by directly plugging it into the provided connector portion is exemplified.

In addition, the control means is configured to output an output signal from the sensor and the alarm device when a door key or other object is inserted into a door cylinder by a person (thief) other than the owner of the vehicle or a person authorized by the owner. There is no particular limitation as long as the alarm signal is output to the alarm device by detecting an output signal from the driving means, and an alarm is generated by the alarm signal. Specifically, when an output signal from the CPU of the computer, that is, an output signal from the alarm device driving means and an output signal from the sensor are input, an alarm signal is output to the alarm device based on these output signals to generate an alarm. A program storing a program for causing the CPU or a AND circuit of a logic element is provided, and when an output signal from the alarm device driving means and an output signal from the sensor are input, these A device for outputting an alarm signal to the alarm device based on the output signal to generate an alarm, further comprising a series circuit of a first switch connected to a sensor and a second switch connected to a receiver, An output signal from a sensor and an output signal from the receiver are input, a drive signal is output to an alarm based on these output signals, and an alarm is generated.

However, in this car anti-theft system,
It is necessary to allow the car owner or a person authorized by the car owner (authorized person) to open the door cylinder lock without being alerted. Prior to insertion into the door cylinder lock, an authorized person can cancel the operation of the system.

As means for canceling the operation of such a system in advance, for example, the alarm device driving unit may be made portable, and a remote control method of operating the control unit by wireless communication from the alarm device driving unit may be operated. Also,
The alarm device driving means may be made portable, and the alarm device driving means may be connected to a control means in the vehicle body via a connector provided on the body of the automobile so that the alarm device driving operation can be performed.

(E) Function The present invention is, for example, when a driver other than an authorized person inserts a key or the like into a key slot of a cylinder lock after a driver leaves a vehicle, light is received from a light emitting element by the key or the like. The light beam incident on the element is blocked, and the output of the light receiving element is switched. Thus, it is detected that a key or the like has been inserted into the key insertion slot, and the alarm emits an alarm.

Here, the key detected by the sensor includes a key corresponding to the cylinder lock, a lock that can be opened without breaking the cylinder lock, a forged key, a pseudo key, and the like.
A tip of a screwdriver is typical as another thing detected by the sensor. Of course, it does not matter whether these are magnetic or non-magnetic. Furthermore, even if the light-receiving element is made of a transparent synthetic resin, for example, a part of the light emitted from the light-emitting element is absorbed or reflected in the light-emitting element, and the amount of light received by the light-receiving element depends on the presence or absence. Therefore, it is possible to detect whether or not the key itself has been inserted into the key insertion slot based on the change in the amount of received light.

Also, the present invention does not require the cylinder lock to be large because the light emitting element and the light receiving element of the sensor are arranged in the through hole formed in the cylinder lock. The lock and the cylinder lock of the present invention can be easily replaced, and it is only necessary to add a light-emitting element and a light-receiving element, which are significantly lighter than a heavy magnet and coil. Does not.

On the other hand, the vehicle owner or a person authorized by the vehicle cancels the driving of the alarm device by the sensor and / or the alarm device driving means, so that the door key or other object is automatically inserted into the door cylinder lock. If inserted, the alarm can be disabled.

(F) Example Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.

FIG. 1 is a perspective view of a door cylinder lock of an embodiment of an automobile anti-theft system according to the present invention, and FIG. 2 is a schematic sectional view of the door cylinder lock. Door cylinder lock 100
Consists of a cylindrical outer cylinder 1 and an inner cylinder 2 mounted inside the outer cylinder 1, and the inner cylinder 2
It is rotatably mounted and has a flat plate-shaped key insertion port 3 in the center, and a door key 200 is inserted into the key insertion port 3.

Also, holes 4 and 4 are formed in the outer cylinder 1 and holes 5 and 5 are formed in the inner cylinder 2, respectively.
5 and 5 are configured to communicate with each other in a state where the door key 200 is not inserted into the inner cylinder 2 to form a through hole X.

That is, the inner cylinder 2 is always positioned at a predetermined position of the outer cylinder 1 by the urging force of the spring S unless the door key 200 is inserted and turned, and the inner cylinder 2 is positioned at the predetermined position. In a state where 2 is located, the holes 4, 4, 5, and 5 are arranged as an example with each other to form a through hole X.

In the holes 4, 4 of the outer cylinder 1, a sensor 6 for detecting that the door key 200 or another object is inserted into the door cylinder lock 100 is attached.

This sensor 6 is composed of an optical sensor,
And a phototransistor 62.

That is, in the outer cylinder 1, the light emitting diode 61 is inserted into one of the holes 4, and the phototransistor 62 is inserted into the other hole 4. Therefore, when the through hole X is formed, the light emitted from the light emitting diode 61 passes through the through hole X, and
It is incident on 62.

On the other hand, when the door key 200 or another object is inserted into the key insertion slot 3 in a state where the through-hole X is formed, light incident on the phototransistor 62 from the light emitting diode 61 is thereby blocked. The output of the phototransistor 62 changes.

Here, whether or not the detected door key 200 or other material is metal or non-metal, whether or not it has magnetism, etc. is not a simultaneous problem, and the door key 200 or other material is transparent. Also, light incident on the phototransistor 62 from the light emitting diode 61 is reflected on the surface of the door key 200 or other
Alternatively, the amount of light received by the phototransistor 62 changes due to being absorbed in other things, so that the door key 200 or other things can be detected from the change in output.

As described above, when the sensor 6 including the optical sensor is used,
When this is detected when the door key 200 or another object is inserted into the key insertion slot 3,
As a means for detecting that the door key 200 has been operated, for example, in the unlocking direction after the key 200 or another object is inserted into the door key insertion slot 3, a limit switch 63 can be used as shown in FIG. 3, for example. . That is,
The limit switch 63 is mounted in the hole 4 of the outer cylinder 1, and its contact 63 a is connected to the hole 5 of the inner cylinder 2.
It is installed so that it faces slightly inside.

After the door key 200 or the like is inserted from the key insertion slot 3 and the inner cylinder 2 is rotated in the unlocking direction by the door key 200 or another thing, the contact 63a is driven by the inner cylinder 2 and the limit switch is turned on. 63 is turned on to generate an output signal.

FIG. 4 is a block diagram of an embodiment of an automobile anti-theft system according to the present invention.

The phototransistor 62 of the sensor 6 is connected to the base of another transistor 7. The power of the transistor 7 is connected via an I / O interface 8 to a CPU of a computer as an example of the control means 9.

On the other hand, the alarm drive means 12 is a means for transmitting a signal for driving an alarm 14 described later, and includes, for example, a remote control transmitter 10 and a receiver 11 as shown in FIG. The remote control transmitter 10 is
This is a means for transmitting a radio wave having a frequency specific to each car. The frequency can be shared to some extent with the frequency of another vehicle as long as there is no risk of interference with the frequency of another vehicle (for example, to prevent interference by a method such as area allocation).

Note that 101 is an antenna unit, 102 is a transmission unit, and 103 is a control unit that controls these units.

The receiver 11 is a means for receiving a radio wave transmitted from the remote control transmitter 10. This receiver 11
Is set in the car. The receiver 11 is connected to the CPU 9 via an I / O interface 13.

Incidentally, the alarm device driving means 12 may not necessarily be a remote control system for transmitting radio waves, for example, by directly inserting the alarm device driving means 12 into a connector portion provided outside the body of the automobile, The driving means may be transmitted to the vehicle.

In this case, the owner of the vehicle or a person authorized by the vehicle may insert the alarm device driving means 12 into the connector portion again so as not to generate a driving signal, or a connector portion provided outside the body of the vehicle. Then, by directly inserting the alarm drive means 12, the drive signal is transmitted to the computer, which is stored in the computer. Then, when the owner of the vehicle or a person authorized by the vehicle opens the door, the remote control is performed. By control
It may be configured to be turned off.

The alarm 14 is a means such as a buzzer that generates an abnormal alarm sound, a horn of an automobile, a red signal lamp that generates red light, or a combination thereof.

The alarm 14 is provided to the CPU 9 by an I / O interface 15.
Connected through.

The ROM 9 is connected to the CPU 9. In the ROM memory 95, when the output signal from the receiver 11 and the output signal from the sensor 6 are input to the CPU 9, the CPU 9 outputs the alarm device based on these output signals.
A program for outputting an alarm signal to 14 to generate an alarm is stored.

Further, the RAM (ram) memory 95 is connected to the CPU 9, and
It is a writable and readable memory used for the operation of PU9.

 FIG. 5 is a block diagram of another embodiment of the present invention.

In FIG. 5, the control means 9 includes an AND circuit of a logic element and the like, inputs the signal from the receiver 11 and the signal from the sensor 6, and outputs the alarm only when both signals are ON. A drive signal is output to the device 14 to generate an alarm.

FIG. 6 is a block diagram of the control means 9 according to still another embodiment of the present invention.

In FIG. 6, the control means 9 includes a series circuit of a first switch 91 connected to the sensor 6 and a second switch 92 connected to the receiver 11. Also in this case, the control means 9 receives the signal from the sensor 6 and the signal from the receiver 11, and outputs a drive signal to the alarm 14 only when both signals are ON, and generates an alarm. It is to let.

 Next, the operation of the above embodiment will be described.

When the driver leaves the vehicle, the driver closes the window, locks the door, and transmits a radio signal for driving the alarm by the remote control transmitter 10. The radio signal is received by the receiver 11 and input to the CPU 9.

On the other hand, in such a state, the thief approaches the car and tries to open the door by inserting a dummy door key or a similar foreign object into the door cylinder lock. Since the sensor 6 is attached to the door cylinder lock 100 as described above, the penetration state of the through-hole X disappears due to the insertion rotation, and light is blocked. As a result, the sensor 6 detects the insertion of the foreign matter. The ON output of the sensor 6 is output from the I / O interface 8
Through the CPU 9. Therefore, the CPU 9 sets the receiver 11
Then, it is confirmed that the ON signal is input from both the sensor 6 and the alarm signal is output to the alarm device 14. Therefore, even if the thief tries to open the door due to foreign matter or the like, the alarm buzzer sounds and the thief cannot be formed. The length of time the buzzer sounds may be set in advance by the CPU 9.

On the other hand, when the driver himself wants to get into the car using the door key, the alarm drive signal is released by the remote control transmitter 10 possessed by the driver. as a result,
When the door key is inserted into the cylinder 100, an ON signal is output from the sensor 6, but an alarm drive signal is not input from the receiver 11, so that the CPU 9 does not output an alarm signal to the alarm device 14, so that an alarm is issued. Don't worry.

Note that both the AND circuit of the embodiment of FIG. 5 and the series circuit of the embodiment of FIG.

(G) Effects of the Invention As is apparent from the above description, the present invention provides a sensor for detecting that a door key or other object is inserted into a key insertion slot of a door cylinder lock and a signal for driving an alarm device. It has an alarm device driving means to output, so that a thief can issue an alarm simply by inserting a door key etc. into the cylinder lock, not only to prevent theft of the car and the equipment inside it, but also to forcibly unlock the cylinder lock It can be prevented from being manipulated and destroyed.

In addition, the sensor includes a light emitting element and a light receiving element arranged with the key insertion port interposed therebetween, and detects the insertion of a door key or the like into the key insertion port by a change in the output of the light receiving element. The insertion can be detected irrespective of the presence / absence or strength of magnetism, and the insertion into the key insertion slot can be detected even if it is transparent.

Further, since the light emitting element and the light receiving element of the sensor are arranged in the through holes formed in the cylinder lock, it is not necessary to make the cylinder lock large, and the cylinder lock having no sensor and the cylinder lock of the present invention are not required. And can be easily exchanged.

Further, since it is only necessary to add a light-emitting element and a light-receiving element which are significantly lighter than heavy magnets and coils, it is hardly possible to prevent a reduction in the weight of an automobile.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door cylinder lock showing an embodiment of an automobile anti-theft system according to the present invention, FIG. 2 is a sectional view of the door cylinder lock, and FIG. 3 is a door cylinder lock showing another embodiment. FIG. 4 is a block diagram of the embodiment, FIG. 5 is a block diagram showing another automobile anti-theft system,
FIG. 6 is a block diagram showing still another automobile anti-theft system. 1 ... Outer cylinder, 2 ... Inner cylinder, 6 ... Sensor,
9: Control means, 12: Alarm drive means, 14: Alarm, 100: Door cylinder lock, 200: Door key.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-99240 (JP, A) JP-A-62-289454 (JP, A) JP-A-62-221952 (JP, A) 111863 (JP, U) Fully open sho 59-174681 (JP, U) Fully open sho 61-155255 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60R 25/10 G08B 15 / 00 G08B 21/00 E05B 65/20 E05B 45/08

Claims (1)

(57) [Claims] An automobile includes a door cylinder lock having an outer cylinder and an inner cylinder having a key insertion opening, and a sensor for detecting that a door key or other object is inserted into the key insertion opening, This sensor is
An automobile anti-theft system comprising: an alarm which issues an alarm when a door key or other object is inserted into the key insertion port, wherein the outer cylinder and the inner cylinder intersect with the key insertion port. An anti-theft system for a motor vehicle, wherein a hole is formed, and the sensor includes an optical sensor disposed in a hole in an outer cylinder constituting the through hole.